Corsa-A drum brakes

Good, I have a problem, it is a bullshit for many of you surely, but I would like to help me.
The other day I was braking the left back wheel of my Opel Corsa (thankfully I was slowly going down a city, if it happens on the road I do not know what had happened), it was completely blocked and I carried it on track ...
I stopped where I could and I realized that when I went back it was released and when walking forward 3-4 meters it was fully blocked.
I disassembled wheel and brake lid and then I saw what had happened ... A spring of one of the shoes had left and a piece that supports the regulator had also left, surely you know which piece I mean, and it was this piece that blocked the shoe because it was crushed against the cube.
I have searched for spare parts and they don't sell me the dock or that piece, everyone wants to sell me the completely prepared kit and costs more than 120 euros.
The shoes are fine, so I do not see the need to buy the kit and what I want is those two pieces, which are the ones broken (also a few months ago that the hypes replaced me and are new).
How can I find those pieces? I went to a scrapping and they don't want to sell me those pieces either because they say that everything that has to do with the braking system cannot sell it ...
I go to have to spend that paste for nonsense.
What can I do?
Thank you.

hello.
If you help you the docks make them, you just have to take the sample and make it. There are people who are dedicated to that, and with respect to the other piece they can also manufacture it.
luck....